package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import com.atguigu.lease.common.result.ResultCodeEnum;
import org.springframework.util.StringUtils;

import java.util.List;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Autowired
    private SystemUserMapper systemUserMapper;
    @Override
    public CaptchaVo getCaptcha() {
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);

        String code = specCaptcha.text().toLowerCase();
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID();
        String image = specCaptcha.toBase64();
        stringRedisTemplate.opsForValue().set(key, code, RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        return new CaptchaVo(image, key);
    }

    @Override
    public String login(LoginVo loginVo) {
        //判断是否携带验证码
        if(!StringUtils.hasText(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        //根据携带的验证码key，从redis中获取验证码
        String redisCaptchaCode = stringRedisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if(redisCaptchaCode == null){
            //说明验证码已过期
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //验证用户输入的验证码和redis中的验证码是否一致
        if(!redisCaptchaCode.equals(loginVo.getCaptchaCode().toLowerCase())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //验证码验证成功，根据username判断用户是否存在
        LambdaQueryWrapper<SystemUser> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SystemUser::getUsername, loginVo.getUsername());
        SystemUser systemUser = systemUserMapper.selectOne(queryWrapper);
        if (systemUser == null) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
//        for (SystemUser systemUser : systemUserList) {
//            if(systemUser.getName().equals(username)){
//                 break;
//            }
//            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
//        }
        //用户存在，验证用户账号状态是否被禁用
        if (systemUser.getStatus() == BaseStatus.DISABLE) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //用户账号未被禁用，验证密码是否正确
        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))) {
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //全部验证完成，返回 token
        return JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());
    }
}
